Implementation of the repeated, laparoscopic-vision-controlled "transversus-abdominis-plane" block (L-TAP) using bupivacaine in laparoscopic bowel resections – A prospective observational study. (October 2022) - Kaufmann, M.; Dorwarth, T.-J.; Hartwig, V.; Benrath, J.; Reißfelder, C.; Herrle, F.